Explain the process of protein formation.
Answers
Answer:
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Answer:
The stomach stores and mixes the food received from the oesophagus with the gastric juice. The gastric glands present in the walls of the stomach secrete several substances, which together constitute the gastric juice.
The main components of gastric juice are hydrochloric acid, mucus, and pepsinogen.
Hydrochloric acid dissolves bits of food and creates an acidic medium. In this medium, pepsinogen is converted to pepsin, which is a protein-digesting enzyme.
Proenzyme pepsinogen Pepsin (active enzyme)
Food rests in stomach for about 4-5 hours, then gets mixed with acidic gastric juices by churning movement of muscular wall and is called chyme at this stage.
Mucus and bicarbonate lubricate the gastric epithelium and protect it from action of HCl.
Small amount of protein digestion (by pepsin) occurs here.
The food from the stomach then passes into the small intestine.